Abstract:
:The development of new photocatalyst towards the highly efficient photo-reduction of U(VI) was highly desirable. In this study, ZIF-8/g-C3N4 photocatalyst was fabricated to photo-reduce U(VI) from aqueous solutions under different water chemistry. It is demonstrated that ZIF-8/g-C3N4 exhibited the fast-photocatalytic rate (completely photoreduction within 30 min), high photocatalytic activity (Kd > 105 mL/g) and superior chemical stability (No significant decrease after fifth cycles). The photoreduction rate of U(VI) significantly decreased with increasing pH, H2O2 radicals and photo-generated electrons play an important role in U(VI) photoreduction by quenching experiments and ESR analysis. According to XPS and XANES analysis, adsorbed U(VI) was partly photo-reduced into U(IV) by ZIF-8/g-C3N4 photocatalyst. The highly efficient removal of U(VI) on ZIF-8/g-C3N4 photocatalyst was attributed to the synergistic effect of ZIF-8 and g-C3N4 photocatalyst. The present study may provide a new strategy to apply new photocatalyst for in-situ photoreduction of U(VI) in actual environmental remediation.
journal_name
Environ Resjournal_title
Environmental researchauthors
Qiu M,Liu Z,Wang S,Hu Bdoi
10.1016/j.envres.2020.110349subject
Has Abstractpub_date
2020-10-28 00:00:00pages
110349eissn
0013-9351issn
1096-0953pii
S0013-9351(20)31246-9pub_type
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更新日期:2006-07-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,评审
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更新日期:2020-10-29 00:00:00
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pub_type: 杂志文章
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更新日期:2006-06-01 00:00:00
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更新日期:2020-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:2013-01-01 00:00:00
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更新日期:2021-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-10-20 00:00:00
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更新日期:2019-05-01 00:00:00
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更新日期:2015-10-01 00:00:00
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